Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e443d4c8b4d52a…

MALICIOUS

PDF

65.8 KB Created: 2021-02-20 00:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 995afa33a176b2c6a9fc0e3c54a757b9 SHA-1: 02b7d9b89e20207ee4537a22a061f46d3ebf453b SHA-256: 22e443d4c8b4d52aef343bffa20a4c7194c025bb1fae2e72ed2db6cb3fc4ae90
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt disguised as educational content. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is likely used to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=india+geography+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fe8f4706cc31.pdfIn PDF document text
    • http://iglivesupportteam.com/81167624745p82ak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_602e39df604a4.pdfIn PDF document text
    • http://dedevolopi.iblogger.org/score_match_hack_tool_android.pdfIn PDF document text
    • http://taxokisekajetek.22web.org/zexevogabomitoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_602aa5ecea78f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fffa383d208a.pdfIn PDF document text
    • http://cz-nitrof.website/cardinal_and_ordinal_numbers_chartetu1f.pdfIn PDF document text
    • http://pokupka.space/molecular_biology_meaning_and_examplesf7uf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/nefowivisedo.pdfIn PDF document text
    • http://zodabozaloti.rf.gd/38285683919.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/55379266033.pdfIn PDF document text
    • http://mopuser.epizy.com/descriptive_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/human_anatomical_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/bible_study_guide_1st_quarter_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/where_the_wild_things_are_voice_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/jufiwaloribalawenafud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 5384 bytes
SHA-256: 861911ead8dc43fa50b600fb355eb499e7319cc759a207530cf69b6e33e2218e
font_01_sfnt_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 10396 bytes
SHA-256: f37be77b6e1e99fc99c5699a83ebe797a15d4bcfb71d848ff7b553718e2875eb

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